1. m. clawson, r. b. held and c. h. stoddard. Land for the Future. John Hopkins Press, Baltimore (1962)
2. o. p. wibberley. Land scarcity in Britain. Journal of the Royal Town Planning Institute, 53. 4 (1967)
3. e. jones. The City in Geography. London School of Economics and Political Science (1962)
4. f. s. chapin and s. f. weiss. Factors Influencing Land Development. Institute for Research in Social Science, University of North Carolina (1962)
5. r. h. best and j. t. coppock. The Changing Use of Land in Britain. Faber and Faber (1962)